Well you'll be able to see Onebox results soon. Google will make them available worlwide.
On top of the organic results (and sometimes at the bottom), Google shows OneBox results for queries that can be answered instantly or when a direct link can be offered.
Users who search for an artist, song title, album title or even lyrics from the song will be given a sample of the music in a pop-up box that will play at least a 30-second segment - in some cases the entire song. There will also be an option to then buy the track.